Fix unused_result lint triggering when a function returns `()`, `!` or an empty enum#43813

Merged

bors merged 2 commits intorust-lang:masterfrom

pengowen123:unused_result

Aug 13, 2017

Commits on Aug 11, 2017

Fix unused_result lint triggering when a function returns `()` or `!`
pengowen123
committed

Commits on Aug 12, 2017

Don't trigger unused_result on functions returning empty enums
pengowen123
committed